Admin Assistant cannot access an Exec's outlook shared calendar in a multi-tenant cloud environment

Question

I have an AA that needs access to the president's outlook Calendar. The Calendar has been shared from a different tenant in their umbrella. The share calendar displays on the AA's calendar list as "Free/Busy is not available."

I'm not sure what is stopping the display if the calendar was shared to her account.

Help?

Answer 1

Thank You Very Much for taking the time to look at this.

I am the IT department for both Tenants. The Calendar sharing is working with Other users in different Tenants.

Please Not that the AA is also a member of the same Tenant but it isn't their primary or "Default" email account in Outlook but has security permissions on both of the Tenants involved in this issue.

1. I logged into the CEO's outlook on his laptop and shared the calendar with edit permissions myself. However when the AA received the invite email it did not automatically add the calendar. The calendar in question had to be added manually.
2. Seeing that multiple tenants have already shared their calendars successfully with the AA it would in my book appear that the permissions between tenants are correctly set.
3. Please refer back to #2

I'm still getting familiar with all of the security settings with this organization I hope I'm not missing an oblivious security permission on these two accounts? i.e - in the old AD days you had to have a special permission on a user for them to be able to use Remote desktop. If this is the case for shared calendars, I would be unaware of that security group in MS Entra. So feel free to educate me if you know of one.

Again Thank You for your Help! I hope I have answered your question thoughtfully enough.

Answer 2

Dear Michael,

Good day!

Thank you for posting to Microsoft Community. We are glad to assist.

If the shared calendar from a different tenant in the multi-tenant cloud environment is displaying as "Free/Busy is not available," there could be a few possible reasons for this issue.

However, to better understand the issue and provide a solution, we need more details from you, please kindly provide us the following information. Thank you

First, check the calendar in the outlook on the web if you are facing the same issue.

1. Please check the permission Permissions: Ensure that the executive has properly shared their calendar with the admin assistant and granted the necessary permissions. Double-check that the sharing settings allow the AA to view free/busy information. The executive should check and adjust the sharing permissions accordingly.
2. Please check Tenant Settings: It's possible that the tenant where the executive's calendar resides has certain settings that restrict sharing of free/busy information to external domains or tenants. The executive or their IT department should review the tenant settings and ensure that external sharing of calendar information is allowed.
3. please check Domain Trust: In a multi-tenant cloud environment, it's crucial to have a trusted relationship established between the two domains (tenants).

Without a proper trust relationship, it may not be possible to access free/busy information across tenants. The IT departments of both tenants will need to work together to establish the necessary trust and ensure that sharing of calendar information is allowed.

It's recommended to involve the IT departments of both tenants to troubleshoot and resolve the issue. They can provide specific guidance based on the cloud environment and its configurations

Appreciate your patience and understanding and thank you for your time and cooperation.

Note: I will check from my end if there is not any service incident related to your issue.

We look forward to your response. This requested information will help us to narrow down the scenario and find the right troubleshooting. We will keep assisting you based on the information you will provide. I sincerely appreciate your patience and cooperation.

Sincerely,

Ashraf | Microsoft Community Moderator